Unable to recieve connect-backs on port 80

1. Disable reporting services if you're using Microsoft SQL Server 2008.

2. When installing Microsoft SQL Server 2008, be sure not to install reporting services, as it will take control of port 80 and prevent incoming connections from reaching Distribution. If you have applications that require reporting services, then either install NTL Studio and SQL on a separate server, or install NTL Studio on a separate server and link it to your main SQL server as an external client.